Sectional hot-air furnace.



A. G. STAPEL.

SEOTIONAL HOT AIR FURNACE.

APPLICATION FILED JUNE 8, 1911.

1 094 6 Patented Apr. 28,1914.

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b /l I COLUMBIA PLANOGRAPH CO.,\VASH|NGTON b c I A. G. STAPEL.

SEGTIONAL HOT AIR FURNACE. APPLICATION FILED JUNE 8, 1911.

1 94,686. Patented Apr. 28, 1914.

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APPLICATION FILED JUNE 8, 1911. 1,Q94,686 Patented Apr. 28, 1914.

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Inventor a 1 V I Attorneys A. G. STAPEL.

SEGTIONAL HOT AIR FURNACE.

APPLIGATION FILED JUNE 8, 1911.

1,094,686, Patented Apr. 28, 1914.

5 SHEETS-SHEET 4.

Witnesses Inventor J/u Y Attorneys COLUMBIA PLANOGRAPH 60.,WAsHlNG'NN.n. c.

A. G. STAPEL.

SBGTIONAL HOT AIR FURNACE. APPLICATION FILED mm; a, 1911.

1,094,686. Patented Apr. 28, 1914.

5 SHEETS$HEET 5.

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Witnesses Inventor r Attorneys COLUMBIA PLANOGRAPH c0.,wAsH|Nu1joN. D.C.

ADOLF G. STAPEL, OF MONTGOMERY, ALABAMA.

SECTIONAL HOT-AIR FURNACE.

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Specification of Letters Patent.

Application filed June 8, 1911.

Patented Apr. 28, 1914-.

Serial No. 631,964.

To all whom it may concern Be it known that I, ADoLr G. STAPEL, acitizen of the United States, residing at ll'lontgomery, in the countyof Montgomery and State of Alabama, have invented a new and usefulSectional Hot-Air Furnace, of which the following is a specification.

The present invention relates to improvements in sectional hot airfurnaces, one object of the. invention being the provision of a furnace,which is composed of a plurality of similarly shaped sections detachablyconnected together, whereby the longitudinal area of the furnace may beincreased or decreased, proportionately to the grate surface.

A further object of the invention is the provision of a hot air furnace,composed of a plurality of sections detachably connected together, eachof said sections comprising its respective part of the fire box, ash pitand radiating fines and main flue, so that when the sections areproperly positioned in the outer shell, a maximum heating surface ispresented to the air within the shell so that an exceedingly efficientfurnace is the result.

\Vith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

In the drawingsFigure 1 is a perspective view of a complete furnaceembodying the present invention, a greater portion of the outer shellthereof being removed to show the exterior detailed construction of thesections. Fig. 2 is a sectional View of one of the sections per 86. Fig.3 is a longitudinal section through three sections and the front andrear plates of the furnace. Fig, a is a view in elevation of the frontplate of the forward section. Fig. 5 is a similar view of the rear plateof the rear section. Fig. (3 is a detail sectional view of one of theside walls of the upper portion of a section. Fig. 7 is a cross sectionthrough a portion of the ash pit member of one of the sections. Fig. 8is a side elevation of the same.

Referring to the drawings, the numeral 1 designates the base or anyproper support for the furnace, which has upstanding therefrom, thefront frame 2 and the rear frame 3 which supports the casing or shell B,the frame 2 being provided with the sheet metal plate A while the frame3 carries a sheet metal plate 5. The shell B, and sheet metal plates 4and 5 constitute the outer casing of the furnace and incase the fuelcontainer and heat radiating members, as will presently appear. Thesheet metal plate A is provided with the draft and cleanout door 6 andwith the fuel inlet door 7, there being provided a door 8 whichconstitutes the clean-out door for the hot air blast tube, as willpresently appear. A clean-out tube 9 in communication with the smokefine 13 is provided.

The fuel combustion and heat radiating members of this furnace, aredisposed as shown in Figs. 1 and 3, the cast-metal end plate A, shown inFig. A, being the sealing member for the first member of the furnace, asclearly shown in Figs. 1 and 3 and provided with the fuel receivingopening 23, the air blast tube opening 2 1 and the cleanout opening 25,which as shown in Fig. 3, is closed. The cast metal rear plate A, asclearly shown in Fig. 5 seals the rear end member or section of thefurnace, as clearly shown in Fig. 3, and is provided with the flueopening 26. The lower section 22 is disposed at the lower end of theplate A, as clearly shown in Fig. 3, and is provided with an apertureadjacent the ash pit of the furnace, while the plate 22 of the rearplate A seals the rear end of the ash pit.

Each one of the intermediate sections of the heating portion of thefurnace, includes a lower ash pit member 12, having the connectingflanges 12", and the longitudinally disposed shouldered rims 12 for thereception of the lower depending vertical walls 16 of the upper portionof the section. The walls 16, as clearly shown in Figs. 2 and 6, areinclined from the point 16 upwardly to the entrance to the flue B, therebeing a plurality, preferably three, of outstanding flanges 16 formedintegral with the inclined portion of the wall, the wall between theflanges being provided with the two openings 17 and 17 which constitutethe inlet and outlet for the products of combustion as clearly indicatedby the arrows in Fig. 2. As shown there are six radiators 17 to eachsection, there being three at each side. Each radiator 17 is i i-M1adapted to surround its respective flange 16, the upper and lower tierods 18 being connected. to the respecti *e upper and lower outer edgesoi each radiator 17 and to the outstanding flanges 1(3 and 18respectively. Each radiator ll is a hollow ast metal member with theinner end. open and slightly tlared so as to neatly fit upon itsrespective flange 16 and thus provide a chamber having the inlet 17' andthe outlet 17.

Carried by each member or section of the furnace and disposed to extendinclinedly downwardly into each radiator 17, as clearly shown in Fig. 2,is a deflector or diaph 'agni 19, the uppe end of which rests upon thesolid portion of the inclined wall at a point adjacent to the lower edgeof the upper outlet opening 17 and to the adjacent portion ot the tlange16. This detlector or diaphragm 19 may be secured in place in anydesired manner or may be cast integral with the radiator 1'7, or thewall of the section.

1i tire box lining let is disposed adjacentthe walls 16 of each sectionof the furnace and forms with the grate 3, the lire box or fuelreceptacle which is tilled through the door 7 and opening 23 of theforward end or" the casing in the front wall 3t ot the tarnace. The bar15 is connected to the bars oi the grate 13 so thatthe bars of the gratemay be operate l.

in inwardly projecting ledge Z) is formed adjacent the lower edge ofeach outlet opening 7, as clearly illustrated in Figs. and (l, for thereception of the top 21 ot the air blast tube of the furnace, theperitorated plate 21 forming the bottom of the line and providing ameans whereby air admitted at either end of the tube which is adjacentthe opening Q-Il oi. the front plate It, will be deflected downwardlythrough the pert i ratitms of the plate 2-1" into ti dome of thecombustion chamber formed a the sections above the inlet openings 17thereof.

The supply oft air to the ash pit and to the hot air blast tube may beregulated. in any desired manner. By positioning the blast tube, asshown, it is evident that air admitted therein and projected at the topor dome of the combustion chamber, thus greatly assists in the completecombustion oi? the coal or soot, especially when the furnace is used toburn soit coal. It might be said that the air blast tube only operatedwhei soft C(ltl. is being burned, the door at that time beingleft open,the same when hard coal is used being closed, as shown in Fig. 1.

The lower inclined walls ot the sine line B are so formed, that anycollection of soot within the flue will. be directed down vardly uponthe upper surface of the Jliangular top El oi. the air blast tube andfinally upon the deflectors 10, whose all e is bustion. clninrbcr, adiaph *agm disposed outwardly and downwardly from the top ot thecombustion chamber into each laterally extending cl amber, saiddiaphaigm forming within each laterally extending chamber, a circnito isroute for the products of combustion passing from the combustionchamber, and a line into which all of said late "ally extending chambersempty.

.lfn a sectional furnace, the combination of an ash pit, a lire box, acombustion chamher having a domed central portion, a hot air blast tubeentering said combustion chamber from the dome thereof, a line, a seriesof late 'ally extending chambers forming a communication between thecombustion chamber and the line, and. a division wall within eachlaterally extending chamber proyicing a deflecting means to dellcct theprod nets of combustion downwardly and out- 'ardly bct'oro entering thetitle.

3. In a sectional furnace, the combination at an ash pit, a fire box, acombustion chamber havino' a dome oortion. a hot air blast tube enteringinto said dome portion at the apex thereof, a fine. chambers formingcommunication with the combustion chamber and the flue and extendinglaterally from the combustion chan'iber, and a deflecting diaphragmextending outwardly and downwardly within each lateral chamber.

in a furnace, the combination of an ash pit, a lire box, a combustionchamber provided with a reduced dome, a hot: air blast tube located inthe dome thereof and in communication with the top ot the combustionchamber, a tlue, a series oi. laterally extending and upwardly inclinedchambers, there being an equal number upon each side of ane. incommunica'ion with the combustion chambe, and a diaphragm extendingdownwardly an'l outwardly from the top of the combustion chambe intoeach later: l. chamher, and terminating at a point below the center lineof its respective laterally extending chamber abort: the bottom and outof contact with the outer w: ll thereof.

5. in a iri'rce, a series of sections, each one of said sections beingprovided with its portion of a lire box, a combustion chamber, twooppositely disposed and laterally extending chambers in communicationwith the combustion chamber, a flue in communication with both of saidlaterally extending chambers, and a partition in each of said laterallyextending chambers extending from the top of the combustion chamberoutwardly to provide two oppositely extending wings to cause theproducts of com bustion to circulate through substantially the full areaof the respective laterally tending chambers when passing from thecombustion chamber to the flue.

6. In a furnace, the combination of a series of sections, each sectioncarrying its portion of an ash pit, a fire box, a combustion chamber, apair of oppositely disposed and laterally extending chambers incommunication at their lower ends with the combustion chamber, a fluecommon to both of the laterally extending chambers and in communicationtherewith at their upper ends, and a diaphragm mounted in each laterallyextending chamber to provide a circuitous route for the products ofcombustion passing from opposite sides of the combustion chamber toopposite sides of the flue.

T. In a sectional furnace, the combination of an ash pit, a fire box, acombustion chamber provided with a reduced dome, a lateral chamber uponeach side of the combustion chamber and in communication at its lowerend therewith, a diaphragm mounted in each lateral chamber, the upperportion of the wall of the combustion chamber providing a lower inletand an upper outlet in each of said lateral chambers, and a flue incommunication with the upper ends of each lateral chamber.

S. A section of a hot air furnace, having a portion of an ash pit, firebox, and combustion chamber, a pair of laterally extending and inclinedchambers in communication with the combustion chamber at the bottomthereof and disposed to have the respective outer and lower wallsthereof inclined, a diaphragm disposed upon the upper end of thecombustion chamber and extending downwardly and toward the lower portionof each of the respective laterally extending chambers and terminatingat a point to provide a passage-way around the lower end thereof and thebottom of its respective laterally extending chamber, and a flue commonto all of said sections.

9. A section for a hot air furnace, having an ash pit, a lire box, acombustion chamber provided with a dome, a hot air blast tube incommunication with the dome thereof and projecting upwardly, a finedirectly above said hot air blast tube, the lower walls of the fluebeing inclined toward the combustion chamber, a series of laterallyextending chambers in communication with the combustion chamber andflue, and a deflector disposed downwardly and outwardly from the blasttube into each laterally extending chamber and dividing each of saidchambers into two communicating compartments.

10. A section for a sectional furnace, comprising a main memberproviding a com bustion chamber and a fine in direct communication, ahot air blast tube crowning the combustion chamber, said main memberbeing provided with openings above and below said hot air blast tube,and laterally extending chambers forming communication between thecombustion chamber and flue.

11. A section for a sectional hot air fur nace, comprising a main memberproviding the fire box, combustion chamber and fine, said main memberbeing provided with a series of apertures in its side walls, a series oflaterally extending chambers connected to said member and over saidapertures thereof to form communication with the combustion chamber andflue through said apertures and the laterally extending chambers, andinclinedly disposed diaphragms, one to each of said lateral chambersdividing its respective chamber into two communieating compartmentsthrough which the products of combustion pass before entering the flue.

12. In a sectional furnace, the combination of an ash pit, a fire box, acombustion chamber provided with lateral openings therefrom and with acentral opening in the apex thereof, a hot air blast tube closing theopening in the apex and in communication with the upper portion of thecombustion chamber, a series of laterally projecting chambers havingtheir lower ends in communication with the combustion chamber, anddownwardly inclined plat-es connected to the top of the combustionchamber and extending into the lateral chambers and providing a spacebetween their ends and the outer walls of the lateral chambers, and aflue in communication with the upper end of said laterally projectingchambers.

13. In a hot air sectional furnace, the combination of an ash pit, afire box, a sectional grate therein, a combustion chamber, saidcombustion chamber being provided with a dome having openings at itslower edge and with a central longitudinal opening therein, a hot airblast tube bridging said central longitudinal opening and incommunication with the dome of the combustion chamber, a flue, a seriesof laterally extending radiator chambers in communication with the loweropenings of the combustion chamber and on each side thereof, and havingtheir upper ends in communication with the flue, and plates extendinginto each of said laterally extending chambers and below the top of theopening from the combustion chamber therein, to cause the products ofcombustion to be deflected downwardly from the dome of the combustionchamber and be caused to pass through the laterally extending chambersbefore entering the flue.

14;. in a furnace, the combination of an ash pit, a tire box, acombustion chamber having a tapered closed upper end, and havinglaterally extending openings in its sides near the the box, a series oflaterally 6X- tending radiator chambers in communication with thecombustion chamber, inclined plates mounted therein with their lowerends extending below the top oi? the openings into said chambers, saidinclined plates each being ojt such a length as to divide the respectivechambers into two communicating eompartments, whereby the products ofcombustion are led from the combustion chamber throughout substantiallythe entire area of each respective laterally extending chamber, and aline common to the upper ends of all of said laterally extendingchambers.

15. In a furnace, the combination of an ash pit a tire box, a combustionchamber having a tapered dome, a fine directly above said dome providedwith inclined Walls lead ing from the dome of said combustion chamber,and oppositely extending radiator chambers in communication at theirlower ends with the combustion chamber and in communication with theflue at their upper ends, and a diaphragm mounted in each of saidlaterally extending chambers and disposed to deflect the products ofcombustion from the combustion chamber downwardly into the lowerportions of the respective laterally extending chambers to provide acircuitous route therefor from the combustion chamber to the flue.

In testimony that I claim the foregoing as my own, I have hereto atlixedmy signature in the presence of tWo Witnesses.

ADOLF G. STAPEL.

Witnesses F. E. STAPEL, S. H. OATER.

fiopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. C.

